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Issue 2, 2017
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Cu(0), O2 and mechanical forces: a saving combination for efficient production of Cu–NHC complexes

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Abstract

Mechanical forces induced by ball-milling agitation enabled the highly efficient and widely applicable synthesis of Cu–carbene complexes from N,N-diaryl-imidazolium salts and metallic copper. The required amount of gaseous dioxygen and insoluble copper could be reduced down to stoichiometric quantities, while reaction rates clearly outperformed those obtained in solution. Utilisation of Cu(0) as the copper source enabled the application of this approach to a wide array of N,N-diaryl-imidazolium salts (Cl, BF4 and PF6) that transferred their counter anion directly to the organometallic complexes. Cu–NHC complexes could be produced in excellent yields, including utilisation of highly challenging substrates. In addition, five unprecedented organometallic complexes are reported.

Graphical abstract: Cu(0), O2 and mechanical forces: a saving combination for efficient production of Cu–NHC complexes

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Publication details

The article was received on 19 Jul 2016, accepted on 16 Sep 2016 and first published on 28 Sep 2016


Article type: Edge Article
DOI: 10.1039/C6SC03182J
Citation: Chem. Sci., 2017,8, 1086-1089
  • Open access: Creative Commons BY-NC license
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    Cu(0), O2 and mechanical forces: a saving combination for efficient production of Cu–NHC complexes

    A. Beillard, T. Métro, X. Bantreil, J. Martinez and F. Lamaty, Chem. Sci., 2017, 8, 1086
    DOI: 10.1039/C6SC03182J

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